Furnace traveling grate.



J. F. CUNNBBN.

v FURNAGE TBAVELING GBATE.

PPLIUATIOH FILED sans?, 1905.

Patented Mar. 23, 1909.

3 SHEETS-SHEET 1.

DYE

J. F. UUNNEBN.

FURNAGE TRAVBLING GEATE.

APPLmATloN FILED SEPT. 27. 1905.

Patented Mar. 23, 1909.

3 SKEBTB-EEEET B.

J. F. CUNNEN( FUBNAGE TRVELING GRATE.

APPLICATION FILED SEPT. 27. 1905. 91 6, 1 12. Patented Mar. 23, 1909. 5 SHEETS-SHEET 3.

JOHN l". GUNNEEN, l" Cl'llUAi'iO, ILLINOH.

FURNACE TRAVELING 'PB ATE.

Specification of Letters 4atent.

Pwtented March 23, 1909.

Application filed September 27, 1905. Serial No. 2130,39?.

To all whom it may concern:

Be it known that I, Jol-IN F. CuNNEnN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in .li urnace Traveling Grates, of which the following is a s ecii'ication.

This invention relates to urnaces andthe object is to provide a furnace having a traveling grate so arranged that each tierof gratebars will be automatically rocked at certain intervals as hc grate moves toward the rear of the furnace; this operation will greatly `assist in thecombustion of coal for the rea"v son that the coal will be stirred by the action of the grate-bars.

" A further object of the invention is to provide a hopper which is provided Witha series of plates and a screen so that when coal is placed into the ho per, the coarse coal will fall upon the traveling grate andthe fine coal -will pass through the screen and thence upon throughout t the coarse coal. This prevents the tine coal from fallingthrougl the grate-bars into the ashpitunconsumei nor will it clog in the spaces between sail grate-bars.

A still further abject is to provide means .whereby the speed of the traveling can be easily and conveniently regulated as desired.

In the accompanying drawings, Figure 1 is alongitudinal section of my improved traveling grate taken on line 1 1 of Fig. 2; Fig. 2 :i an elevation of same, partly in section; lig. 3 is a side view of same, with portions broken away, showin the operating mechanism; Fig. 4 is a deta' plan View of the gratebar 'and connecting links on enlarged scale; Fig. 5 is a side elevation of same, partly in section; Fig. 6 is an end view showing brace rods and sliding bar; Fig. 7 is an enlarged de.- tail view of the contact bar; Fig. 8 is a front elevation of the screen ,showing it removed from the ho per and on a reduced scale.

Similar ures refer to' similar parts e several views.

The grate is mounted upon the movable frame 1 which is provided with wheels 2, said wheels rest upon a track 3.. This allows the grate to be easily inserted into a furnace or removed therefromi A series of brace rods 3 extend through the lower portion of the frame 1, and are adapted to strengthen the side Walls of said frame. A shaft 4 is journaled in the front end of frame 1, and mounted upon this shaft are sprocket wheels 5. The endsof shaft 6, in the rear end of the frame 1, are mounted in bearing blocks 7, which slide longitudinally n ruido brackets (not shown). An adjuster 'fr' screw slmil't S 1s secured to the bearing lilo: :t 7 by means olE which said bearing block curi ying the sha'l't (j may be I- moved longitudinally. Sprocket `Wheels 9 are rigidly secured on either ond of the shaft 6. A drum (not shown) may be secured 4to the shaft 6 and the sprocket wheels 9 if desired.

The grate-bars 1() are formed substantially in the manneras shown in Fig. 7. These grate-bars are provided on the under side thereof with the projections 1 and 12, respectively. Said grate-bars are secured to transverse pivot rods 13 and are held in position thereon by means of cotter p is 1.4 passn ing through projections 11 ai .l 12 and through pivot rod 13. The prigeotioinliv 11 and 12 are Jformed near one end o1' the grat bars thus causing said grntcbars to`remain in a horizontal position, under normal co 'iditions, when moving on thc upper portion oi the frame 1. A tube 10 extends from one side Wall to the other of the frame 1 and a brace rod 12a passes through the frame 1 and through the said tube. To the tube 10a is rigidly secured, by means of clam 13a, har 11a. This bar extends longitu `inally along the frame 1. The transverse pivot rods 13 slide upon the upper surfa ce of this bar, thus preventing the traveling grate 20a from sagging. Un the outer ends oi the ivot rods 13 are secured the link bars 15. 'ese link bars hold the pivot rods 13 iiA position,l forming the endless traveling grate 2U?. The transverse pivot rods 13 engage the sprockets in the sprocket wheels 5 and 9.

15 indicates projections formed on the side walls of the frame 1, upon which the 4traveling grate 20a will slide as said traveling grate moves toward the front of the furnace.

A contact bar 16 is pivotally secured to the frame 1 by means of a yoke 17. To the lower end of this bar is secured a lever 18 to which is pivotally secured one end of the rod 19. A projection 20 is formed in the frame 1 and acts as a stop against which the Contact bar 16 will normal] i rest.r The urpose of the contact bar is t at when the raveling grate 20" moves toward the rear end ol the furnace, the projection 12 on the grate-bar 10 will come in contact with the contact bar 16, thus causing nthe grate-bar 10 to tip, as shown in Fig. 7 of the drawings. This will have a llt) tendency to break the coal which usually loriusl into :t 1i-dto when in the` heated luruilcc.` especially when lino coul is used. Aller the pxoieetiou 12 on Ihc grate-liar IU has passed thi` coutucl hul' lli, hy reason thutsaid grator bars are not centrally disposed on pivot rod l, suino will naturally assumo :i horizontal position. lfurtlurluoro, the eight ol the coal ou the gratwimrs ,lll u'ill assist to vcause said grato-bars to assume a horizontal position.

lt will llo readily understood that anyr number ol' contact liars 1li may be employed. ll it is desired not to use the contact bar 16 the same may be placed out ol operation by pushing the rod 19 backward und causing said contact bar to assume the position as shown in dotted lines in Fig. 7 of the drawings.

A self dumping grate 21 is secured in the rear of the frame 1. Pivot bolts 22 are formed on the side ol said grate 21 and rest in bearings 23. The rear end of the grate 21 is bent at right angles and rests upon pro jection 24, and is so arranged as 'to assume a horizontal position under normal conditions. lVhen, however, sutlicient ashes and the like have been deposited upon the rate 21 to cause same to become overbatnced said grato will ti), thus depositing the contents thereon in t 1e ash pit. i

The fire door 25 may be ofthe usual construction and raised and lowered by means ordinarily used for that pur ose. A plate 26 is secured in the front en of the frame 1, this late holds the coal in position'where 'it can e readily conveyed by the traveling rate 20 to the tire. The lower plate 27 is eid in position in the frame 1 by means of guideways 27. From the front end of this late extends screen 28. 'This screen is held 1n position in the frame 1 by means ot projections (not shown) extending from the side walls of said frame. An upper plate 29 is held in osition in the frame 1 by means of the gui eways 30.

Shaft 4 is provided on one end thereof with gear wheel 31. This gear wheel meshes with worm gear 32, secured to shaft 33. Said shaft 33 is journaled in bearings 34, secured to the frame 1, and a ratchet Wheel 35 is sccured on one end of said shaft.

One en d of .the bracket 36 is pivotally secured to the fraincl and the opposite end thereof engages reciprocating rod 37. A paWl 38 is secured to this bracket and en ages the ratchet wheel 35. One end of brac et 39 is `eigidly` secured to the frame 'l 'and the op posite endthereof loosely envages the lower end of reciprocating rod`37. adjusting rod 4() passes through bracket 39, and regulates the s eed of 'the worm ear 32. Tov Qhtain a c ange of speed the a justinfr rod 4l) is pushed upward until the up er en p thereof engages bracket 36. The adlustin rod 40 may be locked iu position by moans ol' tlulor-.king piu 4l. 'l'lu collar fl? ou lilu roriiworathig rodnw is l'ol' the purpose ol aliou ing hlacltet lili 1.o rest thereon when the adjusting rod l'lil is' not iu contact tlurlwith. 'l hf' rouiprocalitlug' rod 3T is drirou hy :my suitable power. As the reciprocatiiuf rod 51,7 is moved upward tho collar l2 will come iu vouturt with tlir hracluft Jll' and more said bracket upward and the pawl lo engages the ratchet wheel 35 which is rigidlbr ser-,urod to the shalt H23, this will cause said shalt carrying the worin gear 252, lo rotate, and moving gear wheel lil.

'The athf'antages of this furnace are as lol- ,lou-s: When coal is placed u on the plate 29 saine will pass therefrom and)on to screen The coarse coal. will fall on to the grate-bars 1() and the line coal will 'pass through the scrcen28; it will thus be apparent` that the coarse coal will always rest upon the grate and the line coal upon the coarse coal, and

"lil

that all thc ,fine coal will be consumed and will not clog or fall between. the gratefbars 10. When the projection 12 en the gratebar 10 strikes the contact bar 16, one end 'of said grate-bar will tip upward thus breaking the fuel which usually''orms into a soiid mass,y and also allows air to come up from underneath the fire and insure perfect combustion. As the grate moves toward the rear end of the furnace the ashes and the like will be deposited upon the dumping grate 21 and the particles ocoal remaining unconsurned will e consumed, and when a certain amount of ashes and the like have been deposited upon said dumping rate same will tip and deposit the contents thereon in the ash pit. A fur- ,u ther purpose of the dumpinf grate is to exclude air from reaching the .re from the rear endof the furnace.

A further advantage of my arrangement of the grate-bars 1() is, that in returning to the front end. of the furnace saine assumes an 4inclined position, `thus allowing the air from the bottom of the furnace to circulate therethrough,

Another important feature of my invention is the mechanism for o erating the traveling grate. Byineans of t is arrangement l am ableV to obtain a fast speed ora slow speed for the traveling grate, as is best desired.

With slight modifications in construction this traveling furnace grate may be used to advantage in marine and locomotive boiler wfurnaces.

` Slight changes can ofcourse be inade in the general form and arrangement of the several parts herein described without departin from the spirit and scope of n1 f invention, ence I do not Wish to be limite to the exact construction herein set forth.

What I claim as new and desire to secure by Letters Patent, is-` 1. In a furnace of the class described, the combination of a grate receiving frame hav necting the ends of sai ing shafts juurnaled in the front and rear ends thereof, sprocket wheels secpred to said shafts, a traveling ate composed of a plurality of transverse dpivot rods, links con rods, grate. bars provided with a projection on the under sur ace secured to salddpivot rods, said pivot rods being su porte by the sprocket wheels, contact frame against which the pro'ections underneath the grate bars will stri e as the travelingrgrate moves toward the rear-of` the furnace thus tilting the grate bars, substantially as described.

2. I n a furnace of the class described, the combination of a grate receiving frame having shafts mounted in the front and rear ends thereof, s rocket wheels secured to said shafts, a trave ing grate composed of a Vplurality of transverse pivot. rods, links connecting said rods, grate bars provided with a projection on the under surfaceseclired to ivot rods, contact bars pivotall se cure to the main frame against whic the projections underneath the grate bars will ars pivotally secured to the main strike yas the traveling grate moves toward. the rear of the furnace, means for throwing said contact bar out of o eration, a worm gear transmission operate by means of an actuating rod for rotating the shaft in the front end of the furnace, and means for regulatin the speed of said shaft, substantially as ascribed.

3. In a' furnace of the class described, the combination of a grate receiving frame, a feed ho Aper in the front end thereof, an inclined p ate extending from the front toward the rear of the hopper, an inclined screen extending from the rear of the hop er forwardly beneath the late and spaced) there?, from, a plate upon w ich the forward end of the screen rests, said plate inclined rearwardly, substantially as described.

In testimony that I claim the foregoing as my'invention I have signed my name in, presence of two subscribin witnesses.

JOHN CUNNEEN.

Witnesses:

R. L.l CLEvELANU, K. Scrum?. 

